Quoting Donald Knuth 🔗
<blockquote cite="https://www-cs-faculty.stanford.edu/~knuth/papers/claude-cycles.pdf"><p>Shock! Shock! I learned yesterday that an open problem [...]
Simon Willison's Weblog
Posts
Gemini 3.1 Flash-Lite 🔗
<p><strong><a href="https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-1-flash-lite/">Gemini 3.1 Flash-Lite</a></s [...]
GIF optimization tool using WebAssembly and Gifsicle 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>I like to i [...]
February sponsors-only newsletter 🔗
<p>I just sent the February edition of my <a href="https://github.com/sponsors/simonw/">sponsors-only monthly newsletter</a>. If you are a sponso [...]
Quoting claude.com/import-memory 🔗
<blockquote cite="https://claude.com/import-memory"><p><code>I'm moving to another service and need to export my data. List every memory you have [...]
Interactive explanations 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>When we los [...]
Please, please, please stop using passkeys for encrypting user data 🔗
<p><strong><a href="https://blog.timcappalli.me/p/passkeys-prf-warning/">Please, please, please stop using passkeys for encrypting user data</a> [...]
An AI agent coding skeptic tries AI agent coding, in excessive detail 🔗
<p><strong><a href="https://minimaxir.com/2026/02/ai-agent-coding/">An AI agent coding skeptic tries AI agent coding, in excessive detail</a></s [...]
Free Claude Max for (large project) open source maintainers 🔗
<p><strong><a href="https://claude.com/contact-sales/claude-for-oss">Free Claude Max for (large project) open source maintainers</a></strong></p [...]
Unicode Explorer using binary search over fetch() HTTP range requests 🔗
<p><strong><a href="https://tools.simonwillison.net/unicode-binary-search">Unicode Explorer using binary search over fetch() HTTP range requests [...]
Hoard things you know how to do 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>Many of my [...]
Quoting Andrej Karpathy 🔗
<blockquote cite="https://twitter.com/karpathy/status/2026731645169185220"><p>It is hard to communicate how much programming has changed due to A [...]
Google API Keys Weren't Secrets. But then Gemini Changed the Rules. 🔗
<p><strong><a href="https://trufflesecurity.com/blog/google-api-keys-werent-secrets-but-then-gemini-changed-the-rules">Google API Keys Weren [...]
Quoting Benedict Evans 🔗
<blockquote cite="https://www.ben-evans.com/benedictevans/2026/2/19/how-will-openai-compete-nkg2x"><p>If people are only using this a couple of t [...]
tldraw issue: Move tests to closed source repo 🔗
<p><strong><a href="https://github.com/tldraw/tldraw/issues/8082">tldraw issue: Move tests to closed source repo</a></strong></p> It's become ve [...]
Claude Code Remote Control 🔗
<p><strong><a href="https://code.claude.com/docs/en/remote-control">Claude Code Remote Control</a></strong></p> New Claude Code feature dropped [...]
I vibe coded my dream macOS presentation app 🔗
<p>I gave a talk this weekend at Social Science FOO Camp in Mountain View. The event was a classic unconference format where anyone could present [...]
Quoting Kellan Elliott-McCrea 🔗
<blockquote cite="https://laughingmeme.org/2026/02/09/code-has-always-been-the-easy-part.html"><p>It’s also reasonable for people who entered tec [...]
Linear walkthroughs 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>Sometimes i [...]
go-size-analyzer 🔗
<p><strong><a href="https://github.com/Zxilly/go-size-analyzer">go-size-analyzer</a></strong></p> The Go ecosystem is <em>really</em> good at to [...]
First run the tests 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>Automated t [...]
Ladybird adopts Rust, with help from AI 🔗
<p><strong><a href="https://ladybird.org/posts/adopting-rust/">Ladybird adopts Rust, with help from AI</a></strong></p> Really interesting case- [...]
Writing about Agentic Engineering Patterns 🔗
<p>I've started a new project to collect and document <strong><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic En [...]
Writing code is cheap now 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>The biggest [...]
Quoting Paul Ford 🔗
<blockquote cite="https://ftrain.com/leading-thoughts"><p>The paper asked me to explain vibe coding, and I did so, because I think something big [...]
Reply guy 🔗
<p>The latest scourge of Twitter is AI bots that reply to your tweets with generic, banal commentary slop, often accompanied by a question to "dr [...]
Quoting Summer Yue 🔗
<blockquote cite="https://twitter.com/summeryue0/status/2025836517831405980"><p>Nothing humbles you like telling your OpenClaw “confirm before ac [...]
Red/green TDD 🔗
<p><em><a href="https://simonwillison.net/guides/agentic-engineering-patterns/">Agentic Engineering Patterns</a> ></em></p> <p>"<strong>Us [...]
The Claude C Compiler: What It Reveals About the Future of Software 🔗
<p><strong><a href="https://www.modular.com/blog/the-claude-c-compiler-what-it-reveals-about-the-future-of-software">The Claude C Compiler: What [...]
London Stock Exchange: Raspberry Pi Holdings plc 🔗
<p><strong><a href="https://www.londonstockexchange.com/stock/RPI/raspberry-pi-holdings-plc/company-page">London Stock Exchange: Raspberry Pi Ho [...]